| Autor: |
Sung Myung Lee, Jong-Sung Park, Hae-Won Lee, Byung-Kook Kim, Heon Jin Choi, Jong-Ho Lee, Dong Wan Kim |
| Rok vydání: |
2008 |
| Předmět: |
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| Zdroj: |
Journal of the Korean Ceramic Society. 45:226-231 |
| ISSN: |
1229-7801 |
| DOI: |
10.4191/kcers.2008.45.4.226 |
| Popis: |
The dense sintered bodies with ＞ 95% theoretical densities were successfully obtained from the BaZrO₃, BaCeO₃ , Ba(Zr 0.7 Ce 0.3 )O₃solid solution, and core-shell structured 0.7BaZrO₃-0.3BaCeO₃ composite powders prepared by sol-gel methods. The activation energy of Ba(Zr 0.7 Ce 0.3 )O₃ solid solution calculated from the Arrhenius plot of the proton conductivities was similar to that of BaZrO₃. The activation energy of core-shell structured 0.7BaZrO₃-0.3BaCeO₃ composite, however, was much lower than that of BaZrO₃ or Ba(Zr 0.7 Ce 0.3 )O₃ solid solution, and was very similar to that BaCeO₃. These results could be assigned to the Ce-rich grain boundary which was clearly observed by EDX in core-shell structured 0.7BaZrO₃-0.3BaCeO₃ composite. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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